[en] The temperature distribution inside the ECRIS plasma chamber has been studied using finite element analysis. The main goal of these studies was to find out the safest cooling design for the temperature sensitive permanent magnets. In ECR ion sources they are used to provide the hexapole field. Two different designs for the cooling of the magnets were investigated. The temperature distribution on the surface of the plasma electrode was also studied. With the aid of the cooling simulations the most efficient cooling for the new ECR ion source was found. As a result of which, safety and higher reliability of operation can be reached

[en] This paper describes the environmental impact of the production and application of tritium luminous compounds, the occupational exposure, possibilities of improvement and other relevant factors. Also included is a discussion of carbon-14 luminous compounds in consumer products

[en] A collaboration between NSCL and Jlab has developed the reference design and coil winding for Jlab's Super High Momentum Spectrometer (SHMS) horizontal bend magnet. A warm iron ??C?? type superferric dipole magnet will bend the 12 GeV/c particles horizontally by 3?? to allow the SHMS to reach angles as low as 5.5??. This requires an integral field strength of up to 2.1 T.m. The major challenges are the tight geometry, high and unbalanced forces and a required low fringe field in primary beam path. A coil design based on flattened SSC Rutherford cable that provides a large current margin and commercially available fiberglass prepreg epoxy tape has been developed. A complete test coil has been wound and will be cold tested. This paper present the modified magnet design includes coil forces, coil restraint system and fringe field. In addition, coil properties, quench calculations and the full mechanical details are also presented.

[en] This paper presents the successful construction and test results of a magnetic mirror model for the Rare Isotope Accelerator (RIA) that is based on High Temperature Superconductors (HTS). In addition, the performance of thirteen coils (each made with ∼220 meters of commercially available HTS tape) is also presented. The proposed HTS magnet is a crucial part of the R and D for the Fragment Separator region where the magnets are subjected to several orders of magnitude more radiation and energy deposition than typical beam line and accelerator magnets receive during their entire lifetime. A preliminary design of an HTS dipole magnet for the Fragment Separator region is also presented

[en] The high resolution S800 spectrograph built at the National Superconducting Cyclotron Laboratory (NSCL) is specially designed for reactions studies with radioactive beams. Its large acceptances both in solid angle and momentum are well adapted to the large emittances of secondary beams produced by projectile fragmentation. The high resolution is achieved via an analytical reconstruction method in which the aberrations of the spectrograph are calculated a priori from the magnetic field maps and used directly to correct the raw data. Following the coupled cyclotron upgrade now completed at the NSCL, the S800 has undergone a number of improvements. An overview of past and future experiments is also presented

[en] The authors have built and are operating a 50 liter liquid helium vessel with an access port for easy insertion of experiments. The vessel is primarily used to test components of superconducting magnet systems, such as cryogenic current leads. The access port is set at a 45 degrees angle and the entire vessel may be tilted 45 degrees in either direction so that current leads may be tested in any orientation from horizontal to vertical. The vessel was designed to be easily disassembled so that experimental apparatus too large for the access port may be mounted directly in the helium can. This way devices 40 cm in diameter may be tested. The heat load of the vessel has been measured under a variety of experimental conditions. A few devices tested so far in the cryovessel are briefly described

[en] The principal challenges arising from beam-induced energy deposition in superconducting (SC) magnets at high-energy high-luminosity hadron and lepton colliders are described. Radiation constraints are analyzed that include quench stability, dynamic heat loads on the cryogenic system, radiation damage limiting the component lifetime, and residual dose rates related to hands-on maintenance. These issues are especially challenging for the interaction regions (IR), particularly for the considered upgrade layouts of the Large Hadron Collider. Up to a few kW of beam power can dissipate in a single SC magnet, and a local peak power density can substantially exceed the quench levels. Just formally, the magnet lifetime is limited to a few months under these conditions. Possible solutions and the ways to mitigate these problems are described in this paper along with R and D needed

[en] The Facility for Rare Isotope Beams (FRIB) is a new nuclear science facility funded by the DOE Office of Science and Michigan State University (MSU). FRIB is currently under design and will be located on the MSU campus. The centerpiece of FRIB is a heavy ion linac utilizing superconducting RF cavities and magnets which in turn requires a large cryogenic system. The cryogenic system consists of a commercially produced helium refrigeration plant and an extensive distribution system. Superconducting components will operate at both 4.5 K and 2 K. This paper describes the conceptual design of the system including the expected heat loads and operating modes. The strategy for procuring a custom turnkey helium refrigeration plant from industry, an overview of the distribution system, the interface of the cryogenic system to the conventional facilities and the project schedule are also described.

[en] The use of tritium in the watch industry to amplify the luminosity of luminous paintings can induce significant doses to the working personal and also products radioactive wastes that have to be correctly eliminated. On one hand, as demonstrated by several investigations, a lot of commercialized watches do not have the required luminosity according to the ISO standard about radioluminescence for time measurement instruments. In the other hand substitution products without radioactivity are today available on the market. Finally, the difficulty to manage radioactive legacies from the watch industry inevitably contributes to disseminate them. All these considerations motivated the reexamination of the justification of luminous radioactive paintings. Results and approaches exposed in this paper confirm that the strategy to naturally abandon the use of luminous radioactive paintings and to assist the producers in collecting and in eliminating in a controlled manner the resulting radioactive wastes is beneficial to radiation protection. (authors)

[en] The present nuclear physics program at the National Superconducting Cyclotron Laboratory (NSCL) is based on an ECR-ion-source injected K1200 superconducting cyclotron. An upgrade project is now underway to significantly increase the facility's output intensity for light ions and energy for heavy ions by coupling the existing superconducting K500 cyclotron to the K1200. The improved acceleration chain will consist of an ECR-ion-source-injected K500 cyclotron to accelerate ions to ≤17 MeV/nucleon followed by radial, charge-stripping-injection into the K1200 for final acceleration to ≤200 MeV/nucleon. An increasingly large fraction of the experimental program uses fragmentation-produced radioactive nuclei, and a substantially larger capacity fragment separator will also be implemented as part of the upgrade project. The project overview, status, and future plans are presented. (authors)